Ventilation – Workstation ventilator – Spray booth
Patent
1992-06-29
1994-10-18
Joyce, Harold
Ventilation
Workstation ventilator
Spray booth
E05B 1512
Patent
active
053563352
ABSTRACT:
A pressure gradient control system includes a ventilated area divided into a plurality of intercommunicating zones, a zone-to-zone pressure gradient detecting device for detecting pressure gradients between adjacent zones, a control unit for adjusting quantities of air supply or exhaust to/from the zones based on detection information received from the zone-to-zone pressure gradient detecting device to establish a predetermined pressure gradient between adjacent zones, and an interior-ambient pressure gradient detecting device for detecting pressure gradients between an ambient area and those of the zones communicating with the ambient area. The control unit is operable, in response to detection information received from the zone-to-zone pressure gradient detecting device and the interior-ambient pressure gradient detecting device, to adjust quantities of air supply or exhaust to/from the zones, thereby to establish the predetermined pressure gradient between adjacent zones and between the ambient area and those of the zones communicating with the ambient area.
REFERENCES:
patent: 4113175 (1978-09-01), Sutton, Jr.
patent: 4729294 (1988-03-01), Osawa et al.
patent: 4729295 (1988-03-01), Osawa et al.
patent: 4730553 (1988-03-01), Osawa et al.
patent: 4840116 (1989-06-01), Murakami et al.
patent: 5095811 (1992-03-01), Shutic et al.
Matsui Yoshiaki
Moriwaki Mutsumi
Joyce Harold
Taikisha Ltd.
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